This paper mainly studies the effects of quenching temperature of destabilization treatment and natural aging treatment on the microstructure and properties of high chromium cast iron, and calculates the relevant properties with the help of the first performance principle. More research work can be carried out in the future:
(1) The holding time of destabilization treatment will affect the precipitation size and content of carbide, and then affect the hardness. In this paper, the quenching holding time is directly determined as 1H, and the effect of quenching holding time on high chromium cast iron is not systematically studied. Therefore, the quenching holding time needs to be further studied. Subcritical treatment + destabilization treatment is a new heat treatment process of high chromium cast iron, which has important research value, but the relevant research is not involved in this paper.
(2) Although it is clearly observed that the martensitic matrix of high chromium cast iron can precipitate new carbides at room temperature. However, the precipitation mechanism such as microstructure change, driving force of carbide nucleation and growth, and atomic diffusion mode need to be further studied.
(3) Although a suitable artificial aging process is preliminarily discussed to improve the hardness of high chromium cast iron. However, the mechanism of artificial age hardening and structural changes have not been thoroughly studied. The effects of natural aging and artificial aging on the mechanical properties of high chromium cast iron, such as wear and impact properties, need to be further studied.